204240202143440 has 40 divisors (see below), whose sum is σ = 479296399629600. Its totient is φ = 80932566079616.

The previous prime is 204240202143421. The next prime is 204240202143443. The reversal of 204240202143440 is 44341202042402.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 204240202143397 and 204240202143406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204240202143443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11929909790 + ... + 11929926909.

It is an arithmetic number, because the mean of its divisors is an integer number (11982409990740).

Almost surely, 2^{204240202143440} is an apocalyptic number.

204240202143440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204240202143440 is an abundant number, since it is smaller than the sum of its proper divisors (275056197486160).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

204240202143440 is a wasteful number, since it uses less digits than its factorization.

204240202143440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23859836819 (or 23859836813 counting only the distinct ones).

The product of its (nonzero) digits is 49152, while the sum is 32.

Adding to 204240202143440 its reverse (44341202042402), we get a palindrome (248581404185842).

The spelling of 204240202143440 in words is "two hundred four trillion, two hundred forty billion, two hundred two million, one hundred forty-three thousand, four hundred forty".